-fat milk as a required food in school lunches. even those kids who brown bag it from home often buy milk to go with it. the physician's committee for responsible medicine would like to see that change. >> i think that the dairy lobby does a really good job to convince people that this is the only source and the best source of calcium for kids or for anyone, and it's not. >> reporter: registereddietician says there are many sources of calcium and protein that don't contain the saturated fat and lactose or dairy sugar that's in milk, including broccoli, tofu, kale and collared greens. >> you can eat the green leafy vegetables, too. you can eat the beans and greens and get the nutrients you need in the healthiest source possible. >> the petition says kids don't need milk and that's just really difficult and not true. >> reporter: carrie fry represents a dairy industry group that finds pcrn antimilk campaign outrageous. >> if you wanted to make up the available calcium in one cup of milk, you would need 13 servings of pinto beans, and 15 half cup servings of spinach to make up that available